Arrangement for feeding fibres into the twister of an open-end spinning frame

ABSTRACT

An arrangement for feeding fibres into the twister of an openend spinning frame comprises a feed roller, a drive combing roll and a clutch composed of two semiclutches, one fixed on the feed roller shaft and the second coupled with a drive to transmit rotation to the feed roller when in gear with the first semiclutch. The feed roller shaft is radially fixed in the cavity of the feed roller and spring-urged into axial abutment thereagainst, thereby providing for the displacement of the shaft in order that the semiclutches may be thrown into gear.

United States Patent Sharyehenkov et a1.

[4 1 July 15,1975

1 1 ARRANGEMENT FOR FEEDING FIBRES INTO THE TWISTER OF AN OPEN-ENDSPINNlNG FRAME [76] Inventors: Alexandr Alexeevich Sharychenkov,

Ternovka, ulitsa Experimentalnaya, 1, kv. 67; Ljudmila NikolaevnaGavrilova, Ternovka, ulitsa Experimentalnaya, 2, kv. 28, both of Penza,U.S.S.R.

[22] Filed: June 6, 1974 [21] Appl. N0.: 477,018

[52] US. Cl. 57/58.95; 19/105; 57/5891;

[51] Int. Cl. DOlh 1/12; DOlh 1/22 [58} Field of Search 57/50, 92,58.89-58.95;

[56] References Cited UNITED STATES PATENTS 3,210,923 10/1965 Schlosser57/58.95

3,434,184 3/1969 Doudlcbsky et a1. 19/83 3.771.632 11/1973 Kodousek eta1. 57/58.95 X 3,807.158 4/1974 Landuehrkamp et al 57/58.95 3,826,0717/1974 Grau 57/58.95 X 3,828,539 8/1974 Croasdale et a1. 57/58.9l

Primary E.\'aminer.lohn Petrakes Attorney, Agent, or Firm-Holman & Stern[5 7] ABSTRACT An arrangement for feeding fibres into the twister of anopen-end spinning frame comprises a feed roller, a drive combing rolland a clutch composed of two semiclutches, one fixed on the feed rollershaft and the second coupled with a drive to transmit rotation to thefeed roller when in gear with the first semiclutch. The feed rollershaft is radially fixed in the cavity of the feed roller andspring-urged into axial abutment thereagainst, thereby providing for thedisplacement of the shaft in order that the semiclutches may be throwninto gear.

1 Claim, 2 Drawing Figures ARRANGEMENT FOR FEEDING FIBRES INTO THETWISTER OF AN OPEN-END SPINNING FRAME The present invention relatesto'open-end spinning frames, and, more particularly, to arrangements forfeeding fibres into the twister of such frames.

Those skilled in the art known of the existence of arrangements forfeeding fibres into the twister. Such a known arrangement comprises ahousing which accommodates a feed roller and a drive combing rolldisposed adjacent each other so that the fibrous material from thesliver is delivered by the feed roller to the combing roll. The latterseparates the fibrous sliver into individual fibres which aretransported via a channel into the twister. To transmit rotation to thefeed roller, use is made of a clutch made up of two semiclutches, onecoupled with the shaft whereon is mounted the feed roller, while theother linked with a drive, e.g., a constantly rotating shaft.

In the foregoing arrangement, both semiclutches are mounted on the feedroller shaft, the first semiclutch radially fixed to transmit rotationto the shaft and spring-urged into abutment thereagainst, whereas thesecond semiclutch freely disposed on the feed roller shaft. The lattersemiclutch is formed as a gear cooperating with the common drive shaftof the frame. The semiclutches are thrown out of gear by means of anelectromagnet, the first semiclutch serving as the armature thereof.

The foregoing design, however, is undesirably cumbersome, what with thesemiclutches and the feed roller being arranged in a row on one and thesame shaft. Such an arrangement takes much space and requires additionalsupports on the machine framing. Besides, access to the means fordisplacing the first semiclutch is limited, hampering maintenance.

It is an object of the present invention to provide an arrangement forfeeding fibres into the twister of an openend spinning frame having anadvantageous layout of the semiclutches and the feed roller shaft, thusrendering the arrangement compact, simple in design and easy to operate.

The above and other objects are attained by that in an arrangement forfeeding fibres into the twister of an open-end spinning frame,comprising a shaft-mounted feed roller, a drive combing roll feedingfibres into the twister channel, and a clutch composed of twosemiclutches, one fixed on the feed roller shaft, while the othercoupled with the machine drive to transmit rotation to the feed rollerwhen in gear with the first semiclutch, in accordance with theinvention, the second semiclutch is loosely disposed on the feed rollerhaving a cavity coaxial with the geometrical axis of the feed roller,and the shaft of the feed roller carrying the first semiclutch extendsthrough said cavity of the feed roller, the shaft of the feed rollerbeing radially fixed to transmit rotation to the feed roller andspring-urged into axial abutment thereagainst, thereby providing for thedisplacement of the shaft to throw the semiclutches into gear.

Such a design of the arrangement for feeding fibres into the twister ofan open-end spinning frame permits stopping a feed roller as the lattersshaft displaces in the axial direction, without stopping the feedrollers of the other spinning arrangements of the frame. Besides, withthe second semiclutch disposed on the feed roller,

the diagram of gears of the arrangement can be substantially simplified,and hence its size decreased, so that the arrangement can be madecompact.

The invention will be better understood from the following detaileddescription thereof taken in conjunction with the accompanying drawings,wherein:

FIG. 1 is a line diagram of an arrangement for feeding fibres, partialsection; and

FIG. 2 is a view of FIG. 1 taken on the line IIII.

Referring now to the drawings, it will be seen to be illustrated thereinan arrangement for feeding fibres, which comprises a housing 1 (FIG. 1)wherein there are formed two cavities 2 and 3 differing in diameter. Thecavity 1 accommodates a feed roller 4, while the cavity 3 a drivecombing roll 5. The combing roll 5 having a saw-toothed card clothing 6fitted over the surface thereof is driven into rotation by a constantlyr0- tating shaft (not shown) and partially extends into a channel 7 fortransporting fibres to a twister 8 which is not described in detail asbeing widely known in the open-end spinning art.

The feed roller 4 is driven into rotation by a common drive shaft 10(FIG. 1) via ajaw clutch 9 (FIG. 2). The jaw clutch 9 is composed of twosemiclutches 11 and 12 (FIG. 2), the semiclutch 11 being mounted on ashaft 13 of the feed roller 4, whereas the semiclutch 12 being linkedwith the drive shaft 10 (FIG. 1) e.g., via a gear train, a flexiblecoupling, or any other known means capable of transmitting rotation tothe semiclutch 12.

In the embodiment in question, the semiclutch 12 (FIG. 2) is formed as agear with earns 14 on the face side thereof loosely fitted in an annularrecess formed in the feed roller 4. With the semiclutch 12 so disposed,it is free to rotate with respect to the feed roller 4 but preventedfrom displacing along the geometrical 00 axis of the roller.

The gear semiclutch 12 engages agear 15 (FIG. 1) secured on the commondrive shaft 10. i

The feed roller 4 (FIG. 2) is rotatably mounted in supports 16 of themachine framing, and a cavity 17 coaxial with the geometric 0-0 axis ofthe feed roller 4 is formed therein. The shaft 13 passes through thecavity 17 so that its ends extend beyond the roller 4. One end of theshaft 13 is chamfered and carries the semiclutch 11 secured thereon, thesemiclutch 11 being C- shaped in cross-section, and the cams of thesemiclutch 11 cooperating with the cams 14 of the semiclutch 12 totransmit rotation to the shaft 13.

The semiclutch 11 is anchored to the shaft 13 by a screw 18 threadedlyreceived in a hole formed in the shaft 13.

The shaft 13 is prevented from moving radially in the cavity 17 of thefeed roller 4 e.g., by a key 19 disposed in a longitudinal slot 20 ofthe roller 4, which arrangement provides for the transmission ofrotation to the feed roller 4 and for the displacement of the shaft 13in the axial sense. In order that the shaft 13 may displace in the axialsense, the shaft 13 is urged against the feed roller 4 by a spring 21which rests with one end against the projections of the roller 4 (asshown in FIG. 2) and with the other end against an annular projection 22on the shaft 13. The spring 21 drives the shaft 13 together with thesemiclutch 11 in order that the cams of the semiclutch 11 may engage thecams 14 of the semiclutch 12 so as to transmit rotation to the feedroller 4. In order that the shaft 13 may displace in the oppositedirection, i.e., to disengage the semiclutches l1 and 12, an end 13a ofthe shaft 13 which projects beyond the feed roller 4 must be actuatedwith a force directed along the o axis and exceeding the action of thespring 21, thereby displacing the shaft 13 through" the cavity of theroller 4, with the spring 21'being com-' pressed and the semiclutches 11and 12 thrown 'outo'f gear. With the clutch thrown out, the semiclutchl2 continues rotating, whereas the feed roller 4 is stopped by theresistance of the fibrous material fed by the roller 4 from a channel 23in the housing 1 to the combing roll 5.

To disengage the semiclutches l1 and 12, the shaft must be actuated byany means 24, e.g., an electromagnet, a pneumatic or hydraulic cylinder,a lever or a cam.

On the side of the semiclutch 11, the feed roller 4 is protected by abowl-shaped cover 25, and on the opposite side protection is provided bya nut 26 threadedly received into a hole formed in the roller 4, whichnut 26 has a channel 27 coaxial with the cavity 17 of the roller. Theend 13a of the shaft 13 freely passes through the channel 27.

The proposed arrangement operates as follows.

When the means 24 for disengaging the semiclutches 11 and 12 isdisconnected, the shaft 13 is urged by the spring 21 to displace in thecavity 17 of the feed roller 4 in the direction indicated by the arrowA, bringing the semiclutch 11 into engagement with the semiclutch 12.Since the semiclutch 12 is formed as a gear enmeshed with the gear ofthe drive shaft 10, the semiclutch 12 is in constant rotation,transmitting rotation, via the shaft l3.and the key 19, to the feedroller 4 which grips the fibrous material in the channel 23 and deliversit to the constantly rotating combing roll 5. The separated fibres fromthe roll 5 are transported along the channel 7 and into the twister 8.

If it is required to stop the delivery of fibres to the twister 8, theend 13a of the shaft 13 projecting out of the nut 27 is actuated todrive the shaft 13 through the cavity'17 of the roller 4 in thedirection indicated by the arrow B, with the result that the semiclutch11 is thrown out of gear with the semiclutch 12, the semiclutch l2continuing to freely rotate on the roller 4, and the feed roller 4 beingstopped by the resistance of the fibrous material.

In order to bring the feed roller 4 back into operation, it suffices todisconnect the means 24 from the shaft 13.

What is Claimed Is:

1. An arrangement for feeding fibres into the twister of an open-endspinning frame, comprising: a housing; a channel formed in said housingand serving for feeding fibrous material; a cavity formed in saidhousing and communicating with said channel; another cavity formed insaid housing and communicating with said cavity; a feed roller disposedin said cavity and designed for feeding fibres from said channel intosaid other cavity; a combing roll mounted in said other cavity anddesigned for separating fibrous material into individual fibres; anotherchannel formed in said housing, communicating with said other cavity anddesigned for feeding said fibres into the twister; a means for rotatingsaid combing roll; a means for rotating said feed roller; a cavityformed in said feed roller coaxially with the geometrical axis thereof;a shaft extending through said cavity of the feed roller; a means forradial fixation of said shaft in said cavity; a clutch comprising twosemiclutches, one semiclutch being secured on said shaft of the feedroller, while the other semiclutch is loosely fitted over said feedroller, coupled with said means for rotating the feed roller anddesigned for transmitting rotation to the feed roller while in gear withsaid first semiclutch; a means for spring-urging said shaft into axialabutment against said feed roller, thereby providing for thedisplacement of said shaft in order that the semiclutches of said clutchmay be thrown into gear.

1. An arrangement for feeding fibres into the twister of an open-endspinning frame, comprising: a housing; a channel formed in said housingand serving for feeding fibrous material; a cavity formed in saidhousing and communicating with said channel; another cavity formed insaid housing and communicating with said cavity; a feed roller disposedin said cavity and designed for feeding fibres from said channel intosaid other cavity; a combing roll mounted in said other cavity anddesigned for separating fibrous material into individual fibres; anotherchannel formed in said housing, communicating with said other cavity anddesigned for feeding said fibres into the twister; a means for rotatingsaid combing roll; a means for rotating said feed roller; a cavityformed in said feed roller coaxially with the geometrical axis thereof;a shaft extending through said cavity of the feed roller; a means forradial fixation of said shaft in said cavity; a clutch comprising twosemiclutches, one semiclutch being secured on said shaft of the feedroller, while the other semiclutch is loosely fitted over said feedroller, coupled with said means for rotating the feed roller anddesigned for transmitting rotation to the feed roller while in gear withsaid first semiclutch; a means for spring-urging said shaft into axialabutment against said feed roller, thereby providing for thedisplacement of said shaft in order that the semiclutches of said clutchmay be thrown into gear.